Configuring IBM DS5000, IBM DS4000, and IBM DS3000 systems for the storage server
IBM® DS5000™, IBM DS4000®, and IBM DS3000 storage systems are supported with the Storwize® V3500 clustered system.
About this task
The following steps provide the supported options and impact on the Storwize V3500 system:
Procedure
What to do next
The following limitations apply to partitions:
- Only one IBM DS5000, IBM DS4000, or IBM DS3000 system storage partition that contains any of the ports of any of the nodes in a single Storwize V3500 system can be created.
- Only map one partition to any of the ports on any of the nodes that are in the Storwize V3500 system to avoid unexpected behavior. For example, you can lose access to your storage or you might not receive warning messages, even if there are events logged in the Storwize V3500 event log.
The following limitation applies to IBM
DS5000, IBM
DS4000,
or IBM DS3000 Copy
Services:
- Do not use IBM DS5000, IBM DS4000, or IBM DS3000 Copy Services when the Storwize V3500 system is attached to an IBM DS5000, IBM DS4000, or IBM DS3000 system.
- You can use partitioning to allow IBM DS5000, IBM DS4000, or IBM DS3000 Copy Services usage for other hosts.
The following information
applies to the access LUN (also
known as the Universal Transport Mechanism (UTM) LUN):
- The access/UTM LUN is a special LUN that allows a IBM DS5000, IBM DS4000, or IBM DS3000 system to be configured through software over the Fibre Channel connection.
- The access/UTM LUN does not have to be in the partition that contains the Storwize V3500 ports because the access/UTM LUN is not required by the Storwize V3500 system. No events are generated if the access/UTM LUN is not in the partition.
- If the access/UTM LUN is included in the Storwize V3500 partition, the access/UTM LUN must not be configured as logical unit number 0. If the Storwize V3500 partition (the host group) has been created with multiple hosts, the access LUN must be present in all hosts and must be the same logical unit number.
The following information applies to the
logical unit
(LU):
- The Storwize V3500 system attempts to follow the preferred ownership that is specified by the storage system. You can specify which controller (A or B) is used for I/O operations to an LU.
- If the Storwize V3500 system can see the ports of the preferred controller and event conditions do not exist, the Storwize V3500 system accesses the LU through one of the ports on the preferred controller.
- If event conditions exist, the Storwize V3500 system ignores the preferred ownership of the IBM DS5000, IBM DS4000, or IBM DS3000 system.